Fanout vs Pulsar: What are the differences?
Developers describe Fanout as "Realtime APIs made simple". Fanout makes it easy to build realtime APIs and apps. The product is a cross between a reverse proxy and a message broker. Receivers subscribe to channels, and published data is delivered in realtime. On the other hand, Pulsar is detailed as "Distributed solution providing messaging and queuing for streaming data". Apache Pulsar is a distributed messaging solution developed and released to open source at Yahoo. Pulsar supports both pub-sub messaging and queuing in a platform designed for performance, scalability, and ease of development and operation.
Fanout and Pulsar can be primarily classified as "Realtime Backend / API" tools.
Some of the features offered by Fanout are:
- Reverse proxy -- integrate realtime with any level of your technology stack, not just your front end.
- Interoperable -- Add realtime to any API, no matter your backend or database, without changing any of your existing API contracts.
- Open -- cloud or self hosted, it’s up to you. We don’t believe in vendor lock-in.
On the other hand, Pulsar provides the following key features:
- Unified model supporting pub-sub messaging and queuing
- Easy scalability to millions of topics
- Native multi-datacenter replication
Pulsar is an open source tool with 3.77K GitHub stars and 862 GitHub forks. Here's a link to Pulsar's open source repository on GitHub.